Add contributor list design and wiring

tests/integration/components/contributor-list/component-test.js

@@ -0,0 +1,16 @@
+import { moduleForComponent, test } from 'ember-qunit';
+import hbs from 'htmlbars-inline-precompile';
+
+moduleForComponent('contributor-list', 'Integration | Component | contributor list', {
+  integration: true
+});
+
+test('it renders', function(assert) {
+
+  // Set any properties with this.set('myProperty', 'value');
+  // Handle any actions with this.on('myAction', function(val) { ... });
+
+  this.render(hbs`{{contributor-list}}`);
+
+  assert.equal(this.$().text().trim(), '');
+});

tests/unit/models/contributor-test.js

@@ -0,0 +1,9 @@
+import { moduleFor, test } from 'ember-qunit';
+
+moduleFor('model:contributor', 'Unit | Model | contributor');
+
+test('avatarURL returns correct URL', function(assert) {
+  let model = this.subject();
+  model.set('github_uid', '318');
+  assert.equal(model.get('avatarURL'), 'https://avatars2.githubusercontent.com/u/318?v=3&s=128');
+});